A civilian oil rig crew is recruited to conduct a search and rescue effort when a nuclear submarine mysteriously sinks. One diver soon finds himself on a spectacular odyssey 25,000 feet below the ocean's surface where he confronts a mysterious force that has the power to change the world or destroy it.

While siphoning bank funds, computer-wise lovers spot a plot to sink the Federal Reserve.

When an odd-ball tennis team of a Los Angeles college sets out on a road trip to a regional college tennis tournament in fun-filled Las Vegas, all the stops are out and literally "anything goes" both on and off the court.

Julie, a girl from the valley, meets Randy, a punk from the city. They are from different worlds and find love. Somehow they need to stay together in spite of her trendy, shallow friends.

With the discovery of an incoming asteroid, the government of America formulate a plan to destroy it. When the plan fails, all the world can do is wait. The main impact zone is revealed to be Dallas, Texas. Generally, the plot follows the lives and reactions of several characters: an astronomer, her father, her son, two firefighters from Kansas, two young doctors in Dallas and the heads of the government agency in charge of the situation.

A young reporter forces her way into a veteran newswoman's life.

A team of scientists go to a nuclear mining facility to investigate a possible meltdown and instead find a large amount of cloned dinosaurs.

The alien criminal from the first movie is dead, but he left a few eggs which are hatching now. The good alien, who still inhabits Tom Beck's body, has been waiting just in case this happened. Unfortunately, his presence in the body has taken a terrible toll on it, draining it of life energy. Additionally relations with Beck's daughter Juliet (now a cop) have deteriorated. But when the killing starts again, they will need to work together to stop the new generation of aliens.

Doctor Baines has been conducting genetic experiments on piranhas and has made them virtually unstoppable. Unfortunately, his assistants, Maggie and Paul, accidentally release the hybrids into the Lost River Lake threatening to destroy everyone in their path. Can they prevent the flesh-eating piranhas from escaping into the ocean and spawning?